Alternative cooling control method of hot rolling H-section steel flange

A cooling control, H-beam technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of uneven mechanical properties, easy bending, large internal stress, etc., to improve cooling uniformity and reduce internal stress , the effect of improving the comprehensive mechanical properties

Active Publication Date: 2013-04-24
SHANXI ANTAI STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention mainly aims at the problems of different metallographic structures at different positions of hot-rolled H-shaped steel, large internal stress after cooling, easy bending, and uneven mechanical properties, and provides a selective cooling control method for hot-rolled H-shaped steel flanges

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Hot-rolled H-shaped steel Q235B, the specification is: 1000×300, using six-stage water cooling nozzles, installing the cooling device on the centering device of the H-shaped steel rolling mill, and adjusting the distance between the cooling device and the H-shaped steel billet to 100mm. Before being bitten by the rolling mill, the heat detector detects the distance from the head of the H-beam billet to the first water-cooling nozzle, and transmits the distance signal to the remote computer, which controls the electronic control valve installed on the cooling device to control the cooling device water When the cooling nozzle is opened, the water flow rate of the cooling water sprayed by the water cooling nozzle is 30L / min, the water pressure is 0.65MPa, the angle between the bell mouth of the water cooling nozzle and the horizontal is 35°, and the rolling speed of the H-shaped steel billet in the rolling mill is 3.1m / s, and then selectively spray water to cool the H-shape...

Embodiment 2

[0013] Hot-rolled H-shaped steel Q235B, specification: 600×300, adopts five-stage water cooling nozzle, installs the cooling device on the centering device of the H-shaped steel rolling mill, adjusts the distance between the cooling device and the H-shaped steel billet to 80mm, and installs the cooling device on the H-shaped steel billet Before being bitten by the rolling mill, the heat detector detects the distance from the head of the H-beam billet to the first water-cooling nozzle, and transmits the distance signal to the remote computer, which controls the electronic control valve installed on the cooling device to control the cooling device water When the cooling nozzle is opened, the water flow rate of the cooling water sprayed by the water cooling nozzle is 20L / min, the water pressure is 0.55MPa, the angle between the bell mouth of the water cooling nozzle and the horizontal is 30°, and the rolling speed of the H-beam billet in the rolling mill is 4m / s, and then selectiv...

Embodiment 3

[0016] Hot-rolled H-shaped steel Q345B, specification: 400×400, adopts five-stage water cooling nozzle, installs the cooling device on the centering device of the H-shaped steel rolling mill, adjusts the distance between the cooling device and the H-shaped steel billet to 60mm, and installs the cooling device on the H-shaped steel billet Before being bitten by the rolling mill, the heat detector detects the distance from the head of the H-beam billet to the first water-cooling nozzle, and transmits the distance signal to the remote computer, which controls the electronic control valve installed on the cooling device to control the cooling device water When the cooling nozzle is opened, the water flow rate of the cooling water sprayed by the water cooling nozzle is 20L / min, the water pressure is 0.55MPa, the angle between the bell mouth of the water cooling nozzle and the horizontal is 15°, and the rolling speed of the H-shaped steel billet in the rolling mill is 4.2m / s, and the...

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Abstract

The invention belongs to the metal pressure machining technical field and particularly relates to an alternative cooling control method of a hot rolling H-section steel flange. The alternative cooling control method of the hot rolling H-section steel flange mainly solves the problems that H-section steel is different in metallographic organizational structure, easy to bend and not uniform in mechanical performance. The technical scheme of the alternative cooling control method of the hot rolling H-section steel flange comprises installing a cooling device on a centring device of an H-section steel rolling mill; adjusting distance between the cooling device and H-section steel billets; detecting a distance signal at the head or tail of the H-section steel billets and transmitting the distance signal to a remote computer through a thermal detector before the H-section steel billets are bit by the rolling mill; controlling an electronic control valve which is arranged on the cooling device through the remote computer to control the opening of a water cooling nozzle of the cooling device and water flow and water pressure of cooling water injected from the water cooling nozzle; and then performing alternative injection water cooling on the H-section steel flange. The alternative cooling control method of the hot rolling H-section steel flange has the advantages of improving the cooling uniformity, reducing the internal stress and improving the comprehensive mechanical performance of rolled pieces.

Description

technical field [0001] The invention belongs to the technical field of metal pressure processing, and in particular relates to a selective cooling control method for hot-rolled H-shaped steel flanges. Background technique [0002] As a kind of economical cross-section steel, H-shaped steel has the characteristics of large section modulus, convenient structure, and labor-saving compared with ordinary I-shaped steel. It has been widely used in beam and column structural members of building steel structures. Lighten 20-40%, save metal 5-15%, and play an important economic skeleton role in national economic construction. Compared with welded H-shaped steel, hot-rolled H-shaped steel has the characteristics of low cost, low energy consumption, and no hidden danger of welding joints. Due to the complex section of H-beam, in the process of producing hot-rolled H-beam, the temperature distribution of the rolled piece is very uneven during the rolling and cooling process, and the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02
Inventor 徐梅王晋刘志龙
Owner SHANXI ANTAI STEEL CO LTD
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